Rotary steam-engine



(Modell) C. B, & H. H. HALSTBAD.

EOTAEY STEAM EEGJLNE.l

Patente-d Nov. 8,1881.

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UNITED STATES PATENT OFFICE.

'CHARLES B. HALS'IEAD AND HENRY H. HAIJSVTEAD, OF RANTOUL, ILLINOIS. i

ROTARY STEAM-ENGINE,

SPECIFICATION' forming part of Letters Patent No. 249,345, dated November 8, 1881.

i Application filed June 6, 1881. (Model.) i

appertainns to make and use the same, reference being had to theaccompanying drawings, and to the letters or figures of reference markedthereon, which form a part of this specification. Y Y

This invention `relates to -rotary steam-engines; and it consists incertain improvements after stated. The piston-chamber is divided made intwo parts bolted together, said parts being recessed to form a chamberfor thepiston-wheel B on the shaft a, which has suitable bearings, asshown. The piston-wheel has a number of radial pistons, D, four beingpreferred and shown, each piston being made flat and ilaring outward,and ending inward with a small shaft, c, passing into a socketin the hubC, so that the piston is free to turn, as hereinby the projections b,extending toward each other from both sides ofthe chamber, said pro- 40jections being provided with suitable packing,

and leaving enough space between them for the piston to pass throughedgewise. The turning of each piston D is effected by means of cogs orteeth d on .its shaft c, the hub C b eing recessed for them, as shown.These cogs, coming in contact with an irregular or recessed surface, E,adjacent to the hub, cause the piston to turn, one impin gement turningitedgewise, as shown in Fig. 1, so thatit stands across the chamber,

fitting the space, the edges of the piston hav ing suitable packing.

F and F are the upper pipes, severally leading to each division of thepiston-chamber, and G and G are the lower pipes, communicating with eachdivision in like manner. These pipes serve for the admission anddischarge of steam. as when steam is admitted through pipes F and G thewheel is rotated in one direction, and the other two pipes aredischarge-pipes; and when, to reverse the engine, steam is admittedthrough F and G', the wheel is rotated in the opposite direction, andthe pipes F and G become discharge-pipes.

supposing the piston-wheel to be inthe position shown in Fig. 1, two ofthe pistons being in the same plane with the wheel and two standingacross the chamber and on a horizontal line, and steam is admittedthrough pipes F and G, one of the ends of the section of `the wheel Band the projections b b form the abutmentagainst which the steam reacts.The steam passing from said pipes in the direction indicated by thearrows :v is caught by the two horizontal pistons, and the wheel B isrotated in the direction indicated by the arrows, the

pipes F and G being discharge-pipes. So, as V will be observed, eachpiston D takes alternately two positions in the chamber or cylinder asthewheel B is rotated. In one position the piston stands in the sameplane with the wheel, so that itmay pass between the projections b, andafter such passage it is turned toa position edgewise and across thechamber by a cog, d, impinging against the irregular surface E, theparts being usually so constructed and arranged that the piston changesits position once in each quarter of arevolution of the wheel B.

Having described our invention, we claim- 1. In a rotary steam-engine, apiston-wheel having pistons D, provided with cogs d, in combination withan irregular surface, E, substantially as and for the purposesdescribed.

2. In a rotary engine,the piston-wheel chamber having the central inwardprojections, l), and the pipes F F and G G', communicating with thechamber, as shown, in combination with wheel B, having pistons D,provided with cogs d, and the irregular surface E, substantially as andfor the purposes described.

In testimony whereof we aflix our signatures in presence o t' twowitnesses.

.CHARLES B. HALSTEAD. HENRY II. HALSTEAD.

Witnesses S. Boorn, DELMORE DODGE.

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